From 1980 to 2010, the crude incidence of diagnosed diabetes increased 161% from 3.3 to 8.6 per 1,000 population. Similarly, the age–adjusted incidence increased 140% from 3.5 to 8.4 per 1,000 population, suggesting that the majority of the change was not due to the aging of the population. However, from 1980 to 2010, incidence did not increase at a constant rate. Both crude and age–adjusted incidence remained unchanged in the 1980s, and then increased in the 1990s through 2010. From 2008 through 2010, both crude and age–adjusted incidence has shown little change.